﻿52 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  walls 
  and 
  the 
  slips 
  which 
  traverse 
  it. 
  The 
  slope 
  is 
  about 
  900 
  feet 
  

   long 
  and 
  vertically, 
  300 
  feet 
  deep." 
  Further 
  particulars 
  have 
  been 
  

   given 
  by 
  Professor 
  Kemp. 
  "The 
  dip 
  is 
  very 
  irregular, 
  beginning 
  

   in 
  the 
  west 
  end 
  with 
  45 
  it 
  soon 
  flattens 
  to 
  about 
  5 
  and 
  then 
  rolls 
  

   abruptly 
  over 
  to 
  6o°. 
  The 
  bed 
  also 
  drops 
  away 
  to 
  right 
  and 
  left, 
  

   as 
  one 
  descends, 
  having 
  thus 
  a 
  very 
  curious 
  roll, 
  or 
  dome-shaped 
  

   outline. 
  Swells 
  of 
  ore 
  run 
  into 
  the 
  foot, 
  and 
  smaller 
  veins 
  offset 
  in 
  

   the 
  same 
  direction. 
  These 
  small 
  offsets 
  are 
  shot 
  ore 
  and 
  very 
  low 
  in 
  

   phosphorus." 
  In 
  the 
  foregoing 
  accounts 
  no 
  mention 
  is 
  made 
  of 
  

   the 
  ore 
  which 
  lies 
  to 
  the 
  north 
  of 
  the 
  anticlinal 
  axis 
  as 
  shown 
  on 
  

   the 
  plan 
  and 
  have 
  a 
  northwesterly 
  dip; 
  it 
  was 
  exploited 
  in 
  connec- 
  

   tion 
  with 
  the 
  southern 
  workings. 
  The 
  West 
  End 
  deposit 
  is 
  more 
  

   extensive 
  than 
  the 
  Penfield, 
  but 
  it 
  is 
  not 
  so 
  thick 
  on 
  the 
  average, 
  

   though 
  it 
  is 
  said 
  to 
  have 
  given 
  a 
  breast 
  30 
  feet 
  -across 
  in 
  places. 
  

  

  The 
  Hammond 
  and 
  No. 
  8 
  pits 
  are 
  to 
  the 
  northeast 
  of 
  the 
  Pen- 
  

   field 
  and 
  higher 
  up 
  the 
  ridge. 
  They 
  are 
  located 
  on 
  the 
  outcrop 
  of 
  a 
  

   lens 
  which 
  strikes 
  northeasterly 
  and 
  dips 
  30 
  southeast. 
  The 
  two 
  

   pits 
  are 
  nearly 
  connected 
  at 
  the 
  surface 
  but 
  in 
  depth 
  gradually 
  

   separate 
  following 
  the 
  thicker 
  portions 
  of 
  the 
  lens. 
  The 
  latter 
  

   shows 
  a 
  breast 
  up 
  to 
  20 
  feet 
  thick 
  in 
  the 
  exposure. 
  Toward 
  the 
  

   edges 
  it 
  rapidly 
  thins 
  out 
  and 
  may 
  be 
  seen 
  to 
  branch 
  off 
  into 
  small 
  

   stringers 
  of 
  magnetite 
  which 
  gradually 
  disappear 
  in 
  the 
  gneiss. 
  

   The 
  axis 
  of 
  the 
  lens 
  when 
  continued 
  falls 
  nearly 
  in 
  line 
  with 
  that 
  

   of 
  the 
  Dog 
  Alley 
  mine, 
  the 
  shaft 
  of 
  which 
  is 
  about 
  600 
  feet 
  from 
  

   the 
  nearest 
  workings 
  of 
  the 
  Hammond. 
  A 
  transverse 
  fault 
  is 
  said 
  

   to 
  intervene 
  between 
  the 
  two 
  mines 
  though 
  they 
  were 
  considered 
  

   to 
  be 
  on 
  the 
  same 
  deposit. 
  

  

  As 
  shown 
  by 
  the 
  accompanying 
  plan 
  the 
  Dog 
  Alley 
  is 
  a 
  long 
  

   narrow 
  body 
  or 
  shoot. 
  It 
  was 
  tapped 
  at 
  the 
  north 
  by 
  a 
  vertical 
  

   shaft 
  which 
  encountered 
  the 
  ore 
  at 
  250 
  feet. 
  It 
  was 
  one 
  of 
  the 
  

   last 
  to 
  be 
  worked. 
  It 
  yielded 
  a 
  large 
  quantity 
  of 
  high-grade 
  ore. 
  

  

  Mine 
  No. 
  7 
  lies 
  southeast 
  of 
  Hammondville 
  on 
  the 
  edge 
  of 
  the 
  

   belt 
  where 
  it 
  falls 
  away 
  sharply 
  to 
  Burnt 
  Mill 
  valley. 
  There 
  are 
  

   two 
  slopes 
  following 
  a 
  lens 
  that 
  dips 
  35 
  southeast. 
  The 
  main 
  

   slope 
  runs 
  along 
  the 
  foot-wall 
  and 
  is 
  stated 
  by 
  Smock 
  to 
  be 
  nearly 
  

   1000 
  feet 
  long. 
  The 
  ore 
  is 
  reported 
  to 
  have 
  been 
  20 
  feet 
  thick 
  in 
  

   places. 
  Three 
  diabase 
  dikes 
  intersect 
  the 
  ore 
  body 
  which 
  is 
  also 
  

   faulted 
  twice, 
  with 
  a 
  displacement 
  of 
  10 
  feet 
  in 
  one 
  instance 
  and 
  

   of 
  1 
  1 
  to 
  2 
  2 
  feet 
  in 
  the 
  other. 
  Much 
  of 
  the 
  waste 
  rock 
  on 
  the 
  dump 
  

   shows 
  the 
  results 
  of 
  shearing 
  with 
  chloritization 
  of 
  the 
  feldspar. 
  

   The 
  ore 
  has 
  been 
  changed 
  in 
  part 
  to 
  martite 
  and 
  is 
  veined 
  by 
  

   calcite, 
  jasper 
  and 
  nuorite. 
  The 
  deposit 
  gave 
  out 
  abruptly 
  at 
  the 
  

  

  